Weex专栏大前端-BFEweex

Weex内置组件的使用——Weex的学习之路(五)

2019-05-22  本文已影响69人  安卓搬砖小曾

这几天忙着做组件化了,博客晚了些更新,说到组件化,我近期也会用博客来介绍的。上一篇博客我们讲的是weex的内置组件,那么这篇博客我们学习最后四个组件,下篇博客我们就会讲到世界weex页面的编写了。这篇博客我们来学习<waterfall>、<video>、<web>和<richtext>。weex的组件真的是要好好学牢固的,很多人可能会觉得定义太多记不住,没关系,在后续实际页面的编写上我们还是会温习的。

1.<waterfall>的简介和使用

<waterfall> 组件是提供瀑布流布局的核心组件。瀑布流,又称瀑布流式布局是比较流行的一种页面布局,视觉表现为参差不齐的多栏布局。随着页面滚动条向下滚动,这种布局还可以不断加载数据块并附加至当前尾部。

<template>
  <waterfall column-count="2" column-width="auto">
    <cell v-for="num in lists" >
      <text>{{num}}</text>
    </cell>
  </waterfall>
</template>
<script>
  export default {
    data () {
      return {
        lists: ['A', 'B', 'C', 'D', 'E']
      }
    }
  }
</script>

<style></style>

<waterfall>的子组件

<list>组件一样, <waterfall> 组件的子组件只能包括以下四种组件或是 fix 定位的组件,其他形式的组件将不能被正确渲染。

<waterfall>的属性

<waterfall>的事件

支持所有通用事件:

<waterfall>使用示例如下:

<template>
  <waterfall class="page" ref="waterfall"
  v-bind:style="{padding:padding}"
  :column-width="columnWidth" :column-count="columnCount" :column-gap="columnGap"
  :show-scrollbar="showScrollbar" :scrollable="scrollable"
  @scroll="recylerScroll" @loadmore="loadmore" loadmoreoffset=3000
  >
    <refresh class="refresh" @refresh="onrefresh" @pullingdown="onpullingdown" :display="refreshing ? 'show' : 'hide'">
      <loading-indicator class="indicator"></loading-indicator>
      <text class="refreshText">{{refreshText}}</text>
    </refresh>
    <header class="stickyHeader" >
      <div v-if="stickyHeaderType === 'none'" class="stickyWrapper">
        <text class="stickyText">Header</text>
      </div>
      <div v-if="stickyHeaderType === 'appear'" class="stickyWrapper">
        <div class="stickyTextImageWrapper">
          <text class="stickyText">Last Appear:</text>
          <image class="stickyImage" :src="appearImage"></image>
        </div>
        <div class="stickyTextImageWrapper">
          <text class="stickyText">Last Disappear:</text>
          <image class="stickyImage" :src="disappearImage"></image>
        </div>
      </div>
      <div v-if="stickyHeaderType === 'scroll'" class="stickyWrapper">
        <text class="stickyText">Content Offset:{{contentOffset}}</text>
      </div>
    </header>
    <cell v-for="(item, index) in items" :key="item.src" class="cell" ref="index">
      <div class="item" @click="onItemclick(item.behaviour, index)" @appear="itemAppear(item.src)" @disappear="itemDisappear(item.src)">
        <text v-if="item.name" class="itemName">{{item.name}}</text>
        <image class="itemPhoto" :src="item.src"></image>
        <text v-if="item.desc" class="itemDesc">{{item.desc}}</text>
        <text v-if="item.behaviourName" class="itemClickBehaviour"> {{item.behaviourName}}</text>
      </div>
    </cell>
    <header class="footer" ref="footer">
      <text class="stickyText">Footer</text>
    </header>
    <div ref="fixed" class="fixedItem" @click="scrollToNext">
      <text class="fixedText">bot</text>
    </div>
  </waterfall>
</template>

<style>
  .page {
    background-color: #EFEFEF;
  }
  .refresh {
    height: 128px;
    width: 750px;
    flex-direction: row;
    align-items: center;
    justify-content: center;
  }
  .refreshText {
    color: #888888;
    font-weight: bold;
  }
  .indicator {
    color: #888888;
    height: 40px;
    width: 40px;
    margin-right: 30px;
  }
  .absolute {
  position: absolute;
  top: 0px;
  width: 750px;
  height: 377px;
}
  .avatar {
    width: 148px;
    height: 108px;
    border-radius: 54px;
    border-width: 4px;
    border-color: #FFFFFF;
    margin-bottom: 14px;
  }
  .name {
    font-weight: bold;
    font-size:32px;
    color:#ffffff;
    line-height:32px;
    text-align:center;
    margin-bottom: 16px;
  }
  .titleWrap {
    width: 100px;
    height: 24px;
    margin-bottom: 10px;
    background-color: rgba(255,255,255,0.80);
    border-radius: 12px;
    justify-content: center;
    align-items: center;
  }
  .title {
    font-size: 20px;
    color: #000000;
  }
  .stickyHeader {
    position: sticky;
    height: 94px;
    flex-direction: row;
    padding-bottom:6px;
  }
  .stickyWrapper {
    flex-direction: row;
    background-color:#00cc99;
    justify-content: center;
    align-items: center;
    flex:1;
  }
  .stickyTextImageWrapper {
    flex:1;
    justify-content: center;
    align-items: center;
    flex-direction: row;
  }
  .stickyText {
    color: #FFFFFF;
    font-weight: bold;
    font-size:32px;
    margin-right: 12px;
  }
  .stickyImage {
    width: 64px;
    height: 64px;
    border-radius: 32px;
  }

  .cell {
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .item {
    padding: 10px;
    background-color: #FFFFFF;
    align-items: center;
  }
  .itemName {
    font-size:28px;
    color:#333333;
    line-height:42px;
    text-align:left;
    margin-top: 24px;
  }
  .itemPhoto {
    margin-top: 18;
    width: 220px;
    height: 220px;
    margin-bottom: 18px;
  }
  .itemDesc {
    font-size:24px;
    margin:12px;
    color:#999999;
    line-height:36px;
    text-align:left;
  }
  .itemClickBehaviour {
    font-size:36px;
    color:#00cc99;
    line-height:36px;
    text-align:center;
    margin-top: 6px;
    margin-left: 24px;
    margin-right: 24px;
    margin-bottom: 30px;
  }
  .footer {
    height: 94px;
    justify-content: center;
    align-items: center;
    background-color: #00cc99;
  }

  .fixedItem {
    position: fixed;
    width:78px;
    height:78px;
    background-color:#00cc99;
    right: 32px;
    bottom: 32px;
    border-radius: 39px;
    align-items: center;
    justify-content: center;
  }
  .fixedText {
    font-size: 32px;
    color: white;
    line-height: 32px;
  }

</style>

<script>
  export default {
    data: function() {
      const items = [
        {
          src:'https://gw.alicdn.com/tps/TB1Jl1CPFXXXXcJXXXXXXXXXXXX-370-370.jpg',
          name: 'Thomas Carlyle',
          desc:'Genius only means hard-working all one\'s life',
          behaviourName: 'Change width',
          behaviour: 'changeColumnWidth',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1Hv1JPFXXXXa3XXXXXXXXXXXX-370-370.jpg',
          desc:'The man who has made up his mind to win will never say "impossible "',
          behaviourName: 'Change gap',
          behaviour: 'changeColumnGap'
        },
        {
          src:'https://gw.alicdn.com/tps/TB1eNKuPFXXXXc_XpXXXXXXXXXX-370-370.jpg',
          desc:'There is no such thing as a great talent without great will - power',
          behaviourName: 'Change count',
          behaviour: 'changeColumnCount'
        },
        {
          src:'https://gw.alicdn.com/tps/TB1DCh8PFXXXXX7aXXXXXXXXXXX-370-370.jpg',
          name:'Addison',
          desc:'Cease to struggle and you cease to live',
          behaviourName: 'Show scrollbar',
          behaviour: 'showScrollbar',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1ACygPFXXXXXwXVXXXXXXXXXX-370-370.jpg',
          desc:'A strong man will struggle with the storms of fate',
          behaviourName: 'Listen appear',
          behaviour: 'listenAppear',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1IGShPFXXXXaqXVXXXXXXXXXX-370-370.jpg',
          name:'Ruskin',
          desc:'Living without an aim is like sailing without a compass',
          behaviourName: 'Set scrollable',
          behaviour: 'setScrollable',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1xU93PFXXXXXHaXXXXXXXXXXX-240-240.jpg',
          behaviourName: 'waterfall padding',
          behaviour: 'setPadding',
        },
        {
          src:'https://gw.alicdn.com/tps/TB19hu0PFXXXXaXaXXXXXXXXXXX-240-240.jpg',
          name:'Balzac',
          desc:'There is no such thing as a great talent without great will - power',
          behaviourName: 'listen scroll',
          behaviour: 'listenScroll',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1ux2vPFXXXXbkXXXXXXXXXXXX-240-240.jpg',
          behaviourName: 'Remove cell',
          behaviour: 'removeCell',
        },
        {
          src:'https://gw.alicdn.com/tps/TB1tCCWPFXXXXa7aXXXXXXXXXXX-240-240.jpg',
          behaviourName: 'Move cell',
          behaviour: 'moveCell',
        }
      ]

      let repeatItems = [];
      for (let i = 0; i < 3; i++) {
        repeatItems.push(...items)
      }

      return {
        padding: 0,
        refreshing: false,
        refreshText: '↓   pull to refresh...',
        columnCount: 2,
        columnGap: 12,
        columnWidth: 'auto',
        contentOffset: '0',
        showHeader: true,
        showScrollbar: true,
        scrollable: true,
        showStickyHeader: false,
        appearImage: null,
        disappearImage: null,
        stickyHeaderType: 'none',
        // fixedRect:'',
        items: repeatItems
      }
    },

    created() {
      // let self = this
      // setTimeout(()=>{
      //   weex.requireModule('dom').getComponentRect(this.$refs.fixed, result=>{
      //     const x = result.size.left
      //     const y = result.size.top
      //     const width = result.size.width
      //     const height = result.size.height
      //     self.fixedRect = `${x}|${y}|${width}|${height}`
      //   })
      // }, 3000)
    },

    methods: {
      recylerScroll: function(e) {
        this.contentOffset = e.contentOffset.y
      },
      loadmore: function(e) {
        console.log('receive loadmore event')
        // this.$refs.waterfall.resetLoadmore()
      },
      showOrRemoveHeader: function() {
        this.showHeader = !this.showHeader
      },
      onItemclick: function (behaviour, index) {
        console.log(`click...${behaviour} at index ${index}`)
        switch (behaviour) {
          case 'changeColumnCount':
            this.changeColumnCount()
            break
          case 'changeColumnGap':
            this.changeColumnGap()
            break
          case 'changeColumnWidth':
            this.changeColumnWidth()
            break
          case 'showScrollbar':
            this.showOrHideScrollbar()
            break
          case 'listenAppear':
            this.listenAppearAndDisappear()
            break
          case 'setScrollable':
            this.setScrollable()
            break
          case 'setPadding':
            this.setRecyclerPadding()
            break
          case 'listenScroll':
            this.listenScrollEvent()
            break
          case 'removeCell':
            this.removeCell(index)
            break
          case 'moveCell':
            this.moveCell(index)
            break
        }
      },

      itemAppear: function(src) {
        this.appearImage = src;
      },

      itemDisappear: function(src) {
        this.disappearImage = src;
      },

      changeColumnCount: function() {
        if (this.columnCount === 2) {
          this.columnCount = 3
        } else {
          this.columnCount = 2
        }
      },

      changeColumnGap: function() {
        if (this.columnGap === 12) {
          this.columnGap = 'normal'
        } else {
          this.columnGap = 12
        }
      },

      changeColumnWidth: function() {
        if (this.columnWidth === 'auto') {
          this.columnWidth = 600
        } else {
          this.columnWidth = 'auto'
        }
      },

      showOrHideScrollbar: function() {
        this.showScrollbar = !this.showScrollbar
      },

      setScrollable: function() {
        this.scrollable = !this.scrollable
      },

      listenAppearAndDisappear: function() {
        this.stickyHeaderType = (this.stickyHeaderType === 'appear' ? 'none' : 'appear')
      },

      listenScrollEvent: function() {
        this.stickyHeaderType = (this.stickyHeaderType === 'scroll' ? 'none' : 'scroll')
      },

      scrollToNext: function() {
        weex.requireModule('dom').scrollToElement(this.$refs.footer)
      },

      setRecyclerPadding: function() {
        this.padding = (this.padding == 0 ? 12 : 0);
      },

      removeCell: function(index) {
        this.items.splice(index, 1)
      },

      moveCell: function(index) {
        if (index == 0) {
          this.items.splice(this.items.length - 1, 0, this.items.splice(index, 1)[0]);
        } else {
          this.items.splice(0, 0, this.items.splice(index, 1)[0]);
        }
      },

      onrefresh (event) {
        this.refreshing = true
        this.refreshText = "loading..."
        setTimeout(() => {
          this.refreshing = false
          this.refreshText = '↓   pull to refresh...'
        }, 2000)
      },

      onpullingdown (event) {
        if (event.pullingDistance < -64) {
          this.refreshText = '↑   release to refresh...'
        } else {
          this.refreshText = '↓   pull to refresh...'
        }
      }
    }
  }
</script>

2.<video>的简介和使用

<video>的简介

Video 组件用于在页面中嵌入视频内容。

<video>的子组件

text 是唯一合法的子组件。

<video>的属性

<video>的事件

<video>的示例:

<template>
  <div>
    <video class="video" :src="src" autoplay controls
      @start="onstart" @pause="onpause" @finish="onfinish" @fail="onfail"></video>
    <text class="info">state: {{state}}</text>
  </div>
</template>

<style scoped>
  .video {
    width: 630px;
    height: 350px;
    margin-top: 60px;
    margin-left: 60px;
  }
  .info {
    margin-top: 40px;
    font-size: 40px;
    text-align: center;
  }
</style>

<script>
  export default {
    data () {
      return {
        state: '----',
        src:'http://flv2.bn.netease.com/videolib3/1611/01/XGqSL5981/SD/XGqSL5981-mobile.mp4'
      }
    },
    methods:{
      onstart (event) {
        this.state = 'onstart'
      },
      onpause (event) {
        this.state = 'onpause'
      },
      onfinish (event) {
        this.state = 'onfinish'
      },
      onfail (event) {
        this.state = 'onfinish'
      }
    }
  }
</script>

3.<web>的简介和使用

<web>的简介

<web> 用于在 WEEX 页面中显示由 src 属性指定的网页内容。

<web> 可以使 H5 与 Native 元素相结合。

<template>
  <web src="https://www.taobao.com/"></web>
</template>
<script></script>

<style></style>

特别注意事项

<web>的属性

src是要加载的网页内容的 URL。建议指定线上真实存在的 URL 地址。

<web>的事件

支持 appear 和 disappear 事件同时支持:

<template>
  <div class="wrapper">
    <web @pagestart="onPageStart" @pagefinish="onPageFinish" @error="onError" src="https://www.taobao.com/"></web>
  </div>
</template>
<script>
  module.exports = {
    methods: {
      onPageStart: function(e) {
         // page start load
      },
      onPageFinish: function(e) {
         // page finish load
      },
      onError: function(e) {
         // page load error
      }
    }
  }
</script>

<style></style>

4.<richtext>的简介和使用

<richtext>的简介

富文本组件可以内嵌 <span>``<a>``<image>。同时它也支持 <span>``<a>``<image> 的嵌套。

只有 <span>, <a> and <image> 可以包含在 <richtext> 标签里。<span> and <a> 会被显示为 display:inline,而 <image> 会被显示为 display:inline-block

<richtext> 的子节点分两种类型。

富文本组件内部树形结构不能超过255层,超过的层会被忽略。

注意事项

span标签:

<richtext>的使用示例:

<template>
    <div>
        <richtext @itemclick="listener" style="color:red;text-overflow:ellipsis">
            <span>link</span>
            <a href="http://t.cn?_wx_tpl=http://g.tbcdn.cn/ali-wireless-h5/res/0.0.16/hello.js">
                <image style="width:150; height:150" src="https://img.alicdn.com/tps/i2/TB1hRb1IXXXXXX3XVXXXQaP.pXX-87-87.jpeg" pseudo-ref="22"></image>
                <span style="font-size:42;color:#FF5400;">TAOBAO</span>
            </a>
            <image style="width:300; height:300" src="http://www.fresher.ru/manager_content/images2/kadry-veka/big/2-1.jpg" pseudo-ref="23"></image>
            <span>继承Transition继承Transition继承Transition继承Transition继承Transition继承Transition继承Transition继承Transition继承Transition</span>
        </richtext>
    </div>
</template>

<script>
    module.exports = {
        methods: {
            listener: function (foo) {
                var modal = weex.requireModule('modal');
                modal.toast({
                'message': 'My pseudoRef is'+foo.pseudoRef,
                'duration': 3
                });
            }
        }
    }
</script>

<style>
.logo{width: 50;height: 50;}
.title{font-size:42; color: #FF5400;}
</style>

到此我们的weex组件就学习完了,下一篇博客我们来一起看看weex实际页面的编写。一套代码在Android和Ios上都是生效。

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